LG P700 User Manual page 599

Getting to know your phone
10. When the screen freezes
If the screen freezes or the phone does
not respond when you try to operate it:
Remove the battery, reinsert it, then turn the
phone on.
OR
Press and hold the Power/Lock key for
10 seconds to turn it off.
If it still does not work, please contact the
service centre.
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